Some Windows Forms controls are designed for data entry within the application, such as TextBox and ComboBox controls. The TextBox is similar to the ABL EDITOR and FILL-IN widgets. Other controls display application data, such as Label and ListView. There are controls, such as Button, for invoking commands within the application. The WebBrowser control and managed HTML classes, such as HtmlDocument, let you display and manipulate HTML pages within your Windows Forms application. The MaskedTextBox control is an advanced data entry control that lets you define masks that accept or reject user input.